Hassium is a synthetic chemical element with symbol Hs and atomic number 108. It is named after the German state of Hesse. It is a synthetic element and radioactive; the most stable known isotope, 77Hs, has a half-life of approximately 30 seconds.

Atomic Weight:  67576
Density:        56 g/cm3
Melting Point:  78 °C
Boiling Point:  455 °C